Celtic managers have come and gone over the years, each leaving their own telling impact at Parkhead before moving on to new pastures. One man whose name is warmly received among the support is former boss Ronny Deila, who arrived from Elitiserien outfit Stromsgodset in 2014. The 48-year-old spent 2014/15 and 2015/16 at Celtic, winning back-to-back Scottish Premiership titles and the Scottish League Cup. In 2016, it became clear that change may be needed in the dugout, paving the way for Brendan Rodgers to step in; however, fans will always respect his passion for the club and ability to forge…